It suggest that two areas of the brain showing a change in activity when hypnotized are the anterior cingulate gyrus, that deals with plotting of future actions (amongst other things) and the medio-frontal cortex that governs our perception of how we will feel if we take a certain course of action.

"James Horton at the University of Virginia in Charlottesville has even found physical brain differences: highly hypnotisable participants had a 30 per cent bigger rostrum, a part of the brain thought to help focus attention."